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peterkellner.net

.net crawl

First seen 2026-06-03 · Last seen 2026-06-04 · ok HTTP/1.1 200 228 ms crawled 2026-06-03

US · 185.199.111.153 · AS54113 Fastly, Inc.

Reputation 87/100 weak security headers no dmarc policy

Classifying

HTML metadata

Title
Peter Kellner's Blog
Description
Problem solver author teacher
Language
en
Generator
Astro v5.16.6
Canonical
https://peterkellner.net/

Open Graph

url
https://peterkellner.net/
title
Peter Kellner's Blog
description
Problem solver author teacher

Technology

CDN
Fastly
Server
GitHub.com
Analytics
  • Google Tag Manager

Third-party hosts loaded (2)

  • cdn.jsdelivr.net×1
  • www.googletagmanager.com×1

Social

Registration

Registrar
GoDaddy.com, LLC
Created
2000-09-09
Expires
2032-07-15 2231 days left
Updated
2025-05-13
Name servers
  • ns33.domaincontrol.com
  • ns34.domaincontrol.com

DNS records live

NS
  • ns33.domaincontrol.com
  • ns34.domaincontrol.com
MX
  • 10 mx01.mail.icloud.com
  • 10 mx02.mail.icloud.com
TXT
  • D3258128
  • apple-domain=xcmxZST7XkUbYbNe
Verified for
  • Google

Email authentication weak

SPF
v=spf1 include:icloud.com ~all
softfail (~all)
DMARC
not published
DKIM
Show 4 DKIM selectors
  • google: v=DKIM1; k=rsa; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAssC/iJCuzue3YnFBJSTzWDJ9CIOoszjazrOPijJCUNTxWGHSSiZEYd3jZ4M7DAwwC5oYGFxHdqROz7…
  • s1: k=rsa; t=s; p=MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwRZ8muDKYt9RVZyhbpmas3waXn/lWsdalL+kE9Mk1/XzNBDNsQOcfn3u7aDLk+jD9p6I5+xqDVwF7puznI…
  • s2: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQCo2ML3vjvar1qMhTzBNilCOJck/JgaG1+dPRfDy1xLOJBoPi0kCUBp7LFKxFjq7Ml5yQxfaBeyBzx+C3hYLLw8KU…
  • smtpapi: k=rsa; t=s; p=MIGfMA0GCSqGSIb3DQEBAQUAA4GNADCBiQKBgQDPtW5iwpXVPiH5FzJ7Nrl8USzuY9zqqzjE0D1r04xDN6qwziDnmgcFNNfMewVKN2D1O+2J9N14hRprzByFwfQW76…
selectors probed

Certificate (current)

R12
from 2026-04-27 to 2026-07-26
Expires in 51 days

Full certificate history on crt.sh ↗

HTTP security headers

Header hygiene 30/100 Checked live page: https://peterkellner.net/

findings
  • missing HSTS
  • missing Content Security Policy
  • missing frame protection
  • missing content type protection
  • missing Referrer Policy
  • missing Permissions Policy

Links to (7)

Linked from (2)